Investigation of damage mechanisms in CNT nanocomposites using multiscale analysis

Ashwin Rai, Nithya Subramanian, Aditi Chattopadhyay

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This paper examines microscale and sub-microscale damage mechanisms in carbon nanotube (CNT) reinforced nanocomposites. A multiscale modeling framework with a damage model developed from molecular dynamics simulation, is employed to study the physical mechanisms of damage initiation and propagation in CNT nanocomposites at the sub-microscale. Two CNT arrangements, randomly dispersed and entangled agglomerates, are examined. This investigation offers insights into damage properties of particular configurations of CNTs in a polymer matrix, in addition to specific understanding related to damage concentration effects around the filler material at the sub-microscale. High spatial CNT concentration differential is observed to affect damage initiation and rate of damage. It is further shown to result in sub-microscale crack initiation at low global strains, a phenomenon that is also observed at agglomeration boundaries, which results in CNT agglomerations to behave as crack initiation sites.

Original languageEnglish (US)
Pages (from-to)115-124
Number of pages10
JournalInternational Journal of Solids and Structures
Volume120
DOIs
StatePublished - Aug 1 2017

Fingerprint

Carbon Nanotubes
Multiscale Analysis
Nanocomposites
Nanotubes
Carbon nanotubes
nanocomposites
Carbon
Damage
carbon nanotubes
damage
microbalances
Crack initiation
Agglomeration
Crack Initiation
crack initiation
agglomeration
Polymer matrix
Multiscale Modeling
Molecular dynamics
Fillers

Keywords

  • Carbon nanotubes
  • Multiscale modeling
  • Nanocomposites
  • Nanomechanics

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

Cite this

Investigation of damage mechanisms in CNT nanocomposites using multiscale analysis. / Rai, Ashwin; Subramanian, Nithya; Chattopadhyay, Aditi.

In: International Journal of Solids and Structures, Vol. 120, 01.08.2017, p. 115-124.

Research output: Contribution to journalArticle

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